[v5,09/14] mmc: sdhci-omap: Workaround for Errata i834

Message ID 20180427114723.2687-10-kishon@ti.com
State New
Headers show
Series
  • mmc: sdhci-omap: Add UHS/HS200 mode support
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Commit Message

Kishon Vijay Abraham I April 27, 2018, 11:47 a.m.
Errata i834 in AM572x Sitara Processors Silicon Revision 2.0, 1.1
(SPRZ429K July 2014–Revised March 2017 [1]) mentions the maximum
obtainable timeout through MMC host controller is 700ms. And for
commands taking longer than 700ms, hardware timeout should be
disabled and software timeout should be used.

The workaround for Errata i834 can be achieved by adding
SDHCI_QUIRK2_DISABLE_HW_TIMEOUT quirk in sdhci-omap.

[1] -> http://www.ti.com/lit/er/sprz429k/sprz429k.pdf

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Acked-by: Tony Lindgren <tony@atomide.com>

Acked-by: Adrian Hunter <adrian.hunter@intel.com>

---
 drivers/mmc/host/sdhci-omap.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

-- 
2.17.0

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Patch

diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
index d5c1a9c71f95..2232a9974b21 100644
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c
@@ -715,7 +715,8 @@  static const struct sdhci_pltfm_data sdhci_omap_pdata = {
 		  SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC,
 	.quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN |
 		   SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-		   SDHCI_QUIRK2_RSP_136_HAS_CRC,
+		   SDHCI_QUIRK2_RSP_136_HAS_CRC |
+		   SDHCI_QUIRK2_DISABLE_HW_TIMEOUT,
 	.ops = &sdhci_omap_ops,
 };